Detailed Program March 2011 to September 2011 goal – allow the winery to be self-sustainable in water & energy

Best Value Competition June 2011 to January 2012 Advertisement & Prequalification 17 Teams submit Prequalification Packets, June 2011 Prequalification consists of required elements (pass/fail) and scoring (48 points possible) based on experience of team and individuals 5 Teams interviewed, August 2011 Design Build Competition 3 Teams selected to prepare designs and bid price Two one-on-one sessions with each team, Nov & Dec 2011 Bids Received Bid date, January 2012 Detailed evaluation with points awarded Best value price determined

Project Award March 2012

Passive Design clerestory windows and shading devices

Optimize Design reduce loads insulate well daylight reduce infiltration address thermal breaks passive cooling

WALL Exterior Wall 4 inch insulated wall panel over Snap-R 1 inch EPS spacer over 10 inch girt (11in batt insulation) = R-55.7

ROOF Roof 6 inch insulated roof panel over 12 inch metal girt with batt insulation = R-70

specified double wall insulated dampers on all envelope penetrations provided thermal and load bearing insulation pads at structural steel connections Thermal Bridging

Challenges: maintain building interior temperature between 50 and 80 degrees F WITHOUT the use of any active mechanical systems net zero site energy Software Selection: IES vs Epro Thermal / Energy Modeling

Where to Look? Net Zero Energy Building Tip: Understand building physics Infiltration Opaque Envelope Windows

Infiltration construct an airtight building followed ASTM E single point method for air tightness looking for rate less than 0.1 cfm/sf door blower test, identify leaks with smoke guns actual leakage 0.08 cfm/sf

once load reduced, use night flush through one fan with thermal storage in internal concrete walls and slab Net Zero Energy Building Tip: Understand micro climate Mechanical Solution

Temperature Results

Energy Results

If 6 months results are extrapolated to one year, Total Building Energy consumption = 3,588 kWh That is 1.44 kBtu/sq.ft-year Modeled was 1.66kBtu/sq.ft-year Energy Results Net Zero Energy Building Tip: Model accurately